[RobertRoberts]

According to this article, Canada rejected her entry as well. Maybe it's not just the US, but this person actually had a real issue with her visa and her travel plans were not prepared well.

https://www.bbc.com/news/articles/c80y3yx1jdyo

"...when she reached the border [Canada], Mr Burke said the Canadian authorities denied her entry as they were concerned she may try to work illegally."

[junar]

Different person. The person mentioned in the top-level comment is surnamed Mooney.

[8note]

canada cannot deny canadian citizens entry